Automatic hammer.



Z 0 mm 4 M A u Mm 8T TA SM .0 m A 8 9 9 6 0 N (Application filed Mar.29, 1901.).

2 Sheets-Sheet 2.

(No Modal.)

WlTHI-IEEEE:

UNITED STATE I PATENT OFFICE.

ANDRE STROMDAHL, OF MANCHESTER, NEYV HAMPSHIRE.

AUTOMATIC HAMMER.

SPECIFICATION formingpart of Letters Patent No. 694,898, dated. March 4,1902.

Application filed March 29, 1901. Serial No. 53,376. (No model.)

To all whom it may concern:

Be it known that 1, ANDREW STnonDAHL, a citizen of the United States,residing in Manohester, in the county of Hillsborough and 5 State of NewHampshire, have invented a new and useful Improvement in AutomaticHammore, of which the following is a specification.

bodiment of my invention which is especially adapted to the work oflasting shoes and which, therefore, is a combined hammer and pincers. V

In the drawings hereto annexed, which illustrate such an embodiment ofmy invention, Figure l is a side elevation of a lastinghammer; Fig. 2, aplan view of the head end hopper removed; Fig. 3, a vertical sectionalview'of the head end of the hammer; Fig. 4, a transverse section alongthe line a slot Figs. l and 3 looking from the handle end of the hammer.Fig. 5 is a plan View of the hammer-face; and Fig. 6, a section of theham merhead, taken across the line 6 6, Figs. 1 and 4:, and viewed frombelow.

In this embodiment of my invention the hammer-handle is made of twoarticulated parts A and B, which form the two gripping members of thepincers and are jointed at b. The jaws A and B are formed integrallywith the handles A and B and work in the ordi- -nary manner. The handlemember A serves as a basisof'attachment for the operative parts whichcollect, arrange, feed, separate,

and drive the'tacks. The hopper H is a light but strong box, providedwith a suitable cover which is latched at h and issecured to the middleportion A of the handle A by means of ears h, which are intcgralwith orfirmly of the hammer with the cover of ,the tack liver end r of theracewa fastened to the hopper H, and fastening pins or screws k h whichpass through the ears 1 h and the portion A of the memberA. Thehammer-head E is provided with lugs 11,

which are suitably perforated to receive the pins 72. h whereby thehammer-head E is firmly secured to the part A Both the jaws A and B arecentrally and longitudinally slotted at B to receive the tack-raceway R.

The raceway R is made of two parallel blades vent tacks from jumping offthe guides, while.

permitting free movement of the stream of tacks down the guides to thepoint of delivery to the separating mechanism. The tacks are poured intothe hopper H. A few shakes of the hammer will suffice to throw tacksupon the gathering blades r, which collect the tacks, tumble them to theguides r, where they are received points downward, and are arranged in aregular row along the blades 7" under the guard w. A notch 'r serves toprevent the lower part of the row of tacks from moving upward in theraceway, so that although the movements of the hammerin the hands of theworkman may dislodge the tacks in the upper part of the raceway therewill always be an ample supply of tacks at thede- The hammerhead E iscut away at E to receive the deliv ery end of the raceway.

The separation of the tacks one by one from the row arranged in theraceway is efiected by an escapement F, of which the separatorpoint Facts upon the shank of the lowermost tack in the delivery end of theraceway. The tack-separator is made to operate in relation to themovements of the driving mechanism and will be described in detail inconnection therewith. Suffice it to say for the present that theseparator at proper intervals in the operation of the tool pushes a tackfrom the delivery end r of the raceway into the delivery-channel 19,wherein it falls until arrested by the yielding stops S, whichtemporarily obstruct the opening of the channel 19.

The tack-driving mechanism consists of two connected partsthe driver,which gives each tack the driving-blow, and a driver-actuator, whichtransmits the impact of the hammer to the driver. In the embodiment ofmy invention herein shown these parts are represented by the driver Pand the driver-actuator D. The driver-actuator is a movable part,standing normally in such position that it shares the impact of thehammer when the workman strikes a blow with it. By this means a suddenvigorous movement is imparted to the driver-actuator. Connectionsbetween it and the driver impart to the latter the requisitetack-driving movement. Thus in the form of hammer shown in the drawingsthe hammer-head E is perforated with slideways P and D in which thedriver P and actuator D slide, respectively. The actuator D is a piston0r plunger, having formed upon it the gear-teeth D, which constitute arack. The

driver P is similarly provided with rack-teeth P. Between the slidewaysD and P the hammer-head is laterally perforated with a cylindricalbearing, in which the pinion shaft or block 0 is inserted. Thispinion-shaft is provided with a pinion 0 which meshes with both theracks D and P. Spring D coiled around the actuator D, serves by itsstress to urge the actuator to its normal position, in which it projectsfrom the hammerface. When the workman strikes a blow with the hammer,the projecting driver-actuator D shares the impact and is suddenly andforcibly driven into the slideway D causing the pinion C to rotate andimpart to the driverP a movementinreverse direction. The tack which haspreviously been lodged in the delivery-channel p, which is coincidentwith slideway P is thus forced out of the deliverychannel, the stops Syielding to the stroke of the driver. As the workman raises the hammerfor the next blow the spring D again projects the actuator D and bymeans of the connections hereinabove described retracts the driver P. InFig. 3 the parts areshown in this their normal position.

It is essential to the correct operation of an automatic hammer that atack or nail feeding mechanism be provided whereby the driving parts aresupplied with a tack for each descent of the driver. Many mechanismshave been contrived which serve analogous purposes in other nail-drivingtools and machines and may prove adaptable to cooperation with thedriving mechanism characteristic of my invention. I have shown in thedrawings one form of tack feeder or separator which in practice hasserved its purpose satis factorily.

The tack feeder or separator is shown atF in Figs. 1, 3, and 4 and is anescapement which permits the passage of one tack at a time from thoraccwayinto the delivery-channel p. The feeder is a three-pronged claw,whereof one prong is the finger F which is armed with theseparator-point F which moves across the lower end 1' of the raceway,Figs. 3 and 4. The second prong is the guide pin F which slides in atransverse perforation in the hammer-head E and serves to guide thefeeder in its reciprocatory movements. The third prong is thecam-follower F which cooperates with the cam-surface C to give thefeeder its requisite movements. The cam-surface C is formed in the endof the pinion-body C and turns under the follower F whenever the pinionis rotated either by the ascent or descent of the actuator D. Aleaf-spring F which is secured by the fastening-screw 71 Fig. 1,bears atits end F on the separator F, so as to keep the follower F constantly incontact with the cam O.

The connection of the tack feeder or separator with thetack-drivingmechanism is so arranged that the movements of the separator finger Fare timed with reference to the movements of the driver P. Suppose thehammer to be prepared for use by filling the hopper H with tacks. Thehammer is then shaken until the raceway R is filled withproperly-arranged tacks, the lowermost tack resting with its shankagainst the separator-- point F, the parts being in their normalposition, as shown in the several figures. Now if the hammer-head bepressed down upon a bench or if a blow be struck with it the actuatorand driver make their movement above described, and then as the hammeris raised the actuator-spring D returns the driving mechanism to itsnormal position. This double excursion of the driving mechanism turnsthe cam O, and the feeder F by means of the follower F is moved out andthen in under the influence of the spring F", the feeding-point F movingout and in across the raceway-channel. The outward movement of thefeeding-finger F allows the lowermost tack to pass by the point F whenit would fall into the delivery-channel p were it not for the fact thatthe driver P fills the channel. When the driver P is retracted, thefeeding-finger inserts its point F behind this tack and wedges it outinto the tack-delivery channel 19, wherein it falls, to be arrested bythe stops in the delivery-channel. These stops may be double or singleand may be arranged in the path of the driver wher- IIO ever thedesigner of a hammer embodying my blocks S. L'Ihe stress of .the spring3 is eX-- erted toiclasp the blocks S together, as shown ,in-Fig. 6.111' Fig. dtheuniting ends of the blocksS are shown tapered from abovein order. to admit the driverP. .When a tack has beeon separated fromthe row-in the raceway I and drops into the delivery-channel 12, itrests f point downward upon the stopeblocks S.

Then at the next descent of the driver P. the

tack .isv driven, the blocks separating. in response to the. stroke ofthe driver.

Occasionally it'is .desirable to suspend the automatic action of thehammer, .so as to use the hammer in the ordinary way. For this purposelprovide the catch K,which is the end of a latch insertedin a suitableperforation in'the side of-the hammer and is seen in Figs. 1- 1 and-3.This latch isanextension fromthe bar 10 with which it is connected bythe dset'k. The bar 70 slides in lugs it, which are secured to or formpart of the plate-k which is fastened to the hammer-handlein suchposition that the-finger-hold iofiwhich is suitably bent outward,- lieswithin easy reach of the workmans forefinger. A spring constantlyeurgesthe-latch 76 toward the hammerhead E.

the actuator whereby movement of. the actuatorin response to impact actuates the driver.

On the side of the actuatorHD which lies.

opposite the latch end kthere I is a notch d; which-registers with thelatch. end K'when the actuator is raised to its farthest entrance intothe hammer-head andwhen the end of the actuator is flush-,- orinearlyso, with the face of the hammer-head, Fig.'=3. So long as: the workmanpresses on the finger hold'is the I actuator slides up and downwithout3-hin--- drauce butshould the workman wish tos usi .pend the.automatic actionof the hammer he lets go the finger-hold k at the timehe strikes a blow, and. the spring is then thrusts the latch end K intothe notchd, whenthe latter registers with it ands holds all-theautomatic Then the hammer may be parts in restraint. used like anordinary tool.- 1

What I claim, and-desire to securepby Let-w ters Patent, is

1. In an'automatic hammer,--the combination with tack-feedin g devicesota hammer.- head,- a. movably mounted tackdriver, a driver-actuatormovably mounted in suchposition as to share the .im pact of the ham mer,and connections between the driver and 2. In an -automatichammenthecombination'of a hammer-head, a hopper} a raceway.

leading therefromsto a driver, the driver, a

driver-actuator movably mounted and normallyprojecting from thehammer-'face,and i connections between the actuator and-driver whereby.movement of the actuator transmits tothe driver amovement in reversedirection .to that oftheactuator'. V f

3. In an automatic hammer,thecombina tionof ahammer; -a hopper,aracewaydeading therefrom to a-driver,the movably-mounted driver,-a'movabledrivereactuator mounted in positionto share the impact of thehammer, and connections betweenthe-actuator and. the driver wherebymovement of theformer in response to impact transmits a drive ingmovement to the latter. 4. In-an automatic hammer,

ing therefrom to a delivery-channel, the dethecombinaltion of a hammer,a hoppera raceway lead 7 livery-channel, a driver movabletherein, a

movable driven-actuator mountedin position to share the impact ofthehammer and connections betweenthe actuator and the driverwherebymovement of the former in response to impact actuates thelatterto force a tac out of the delivery-channel.

5. In an automatic ham-merythe combination of tack-feeding devices, ahammer-head, a movably-mounted driver,amovably-monnted driver actuator,'normally extended beyond the face of the hammer-head, and-connectionsbetween the actuator and the-driver whereby movement of the formerinresponse driving movement to ator and the driver whereby movement oftheformer in resp'onse 'to-yimpactf transmits adriving-movement tothelatter.

7.. In an automatic hammer, the combination of a hopper-ya racewayleading therefrom to a delivery-channel in-ahammer-head, the

ham trier-head, a-dri-ver movably mounted in the hammeriheadg amovably-mounted driveractuator, normallyextended beyond theface ofthehammer-head, and. connections be-i tween the actuatorand'driverwhereby1move= ment of :the former in response to impact ace"tuates the latter toforce a tack out of the dea-r' livery-channel.

8. In'an automatic-hammer, the combina-'- tion'with tack-feeding devicesof a ihammer-+- head, two slidewaysxtherein, a driver slid--inglymounted-in one slideway, a driver-actu atorslidingly mountedintheother, the actu-:- a

ator normally-extended'to such position as to share the impact of thehammer, and connections between the'actuator and thedriver wherebymovementof-the formerin response to impact transmits driving movementoi-the latter. 7 V

9., Inv an automatic hammer the combi-na tion ofa hopper, a racewayleading from the hopper toa delivery-channelin a hammer head, thehammer-head, two slideways therein; one-coincidentwith'thewdeliverychannel, 1 a driver :sliding' in said slidtwvay,-':the:other slideway bearing a movable driver-actuator.

whichis normally'extendedbeyond the face of thehammer-head,and'connections between the actuator and driver whereby'movement of theformer in response to impact of the hammer actuates the latter to forcea tack out of the delivery-channel.

10. In an automatic hammer, the combination with tack-feeding devices ofa ham merhead means for yieldingly holding a tack in the path of atack-driver, the movably-mounted tack-driver, a driver-actuator movablymounted in such position as to share the impact of the hammer, andconnections between the driver and the actuator whereby movement of theactuator in response to impact actuates the driver.

11, In an automatic ham mer, the combination of a hammer-head, a hopper,a raceway leading therefrom to a driver, the driver, a yielding stop inthe path of the driver, a driveractuator movably mounted and normallyprojecting from the hammer-face, and connections between the actuatorand driver Whereby movement of the actuator transmits to the driveramovement'in reverse direction to that of the actuator.

12. In an automatic hammer, the combina tion of ahammer, a hopper, araceway leading therefrom to a driver, the movably-mounted driverayielding stop in the path of the driver, a movable driver-actuatormounted in position to share the impact of the hammer, and connectionsbetween the actuator and the driver whereby movement of the former inrespouse to impact transmits a driving movement to the latter.

13. In'an automatic hammer, the combination of a hammer, ahopper, araceway leading therefrom to a delivery-channel, the deliverychannel, adriver movable therein, a yielding stop in the path of the driver, amovable driver-actuator mounted in position to share the impact of thehammer; and connections between the actuator and the driver wherebymovement of the former in response to impact actuates the latter toforce a tack out of the delivery-channel.

14. In an automatic hammer, the combination of tack-feeding devices, aham mer-head, a movably-mounted driver, a yielding stop in the path ofthe driver, a movably-mounted driver-actuator, normally extended beyondthe face of the ham mer-head, and connections between the actuator andthe driver whereby movement of the former in response to impacttransmits a driving movement to the latter.

15. In an automatic hammer, the combination of a hopper, a racewayleading therefrom to a driver, the movably-mounted driver, a yieldingstop in the path of the driver a movable driver-actuator normallyextending beyond the face of the hammer-head, and connections betweenthe actuator and the driver whereby movement of the former in responseto impact transmits a driving movement to the latter.-

16. In an automatic hammer, the combinati on of a hopper, a racewayleading therefrom to a delivery-channel in a hammer-head, thehammer-head, a driver movably mounted in tuator, normally extendedbeyond the face of.

the hammer-head, and connections between V the actuator and driverwhereby movement of the former in response to impactactuates the latterto force a tack out of the deliverychannel.

17. In an automatic hammer the combination with tack-feeding devices, ofa hammerhead, two slideways therein, a driver slidingly mounted in oneslideway, a driver-actuator slidingly mounted in the other, the actuatornormally extended to such position as to share the impact of the hammer,a yielding stop in the driver-slideway, and connections between theactuator and the driver whereby movement of the former in response toimpact transmits driving movement to the latter.

18. In an automatic hammer the combination of a hopper, a racewayleading from the hopper to a delivery-channel in a hammerhead, thehammer-head, two slideways therein, one coincident with thedelivery-channel, a driver sliding in said slideway, the other slidewaybearing a movable driver-actuator which is normally extended beyond theface of the hammer-head a yielding stop in the delivery-channel, andconnections between the actuator and driver whereby movement of theformer in response to impact of the hammer actuates the latter to forcea tack out of the delivery-channel.

19. In an automatic hammer, the combination with tack-feeding devices ofa hammer, tack-driving mechanism consisting of a driver and adriver-actuator, each provided with a rack which meshes with a pinion,the pinion, the driver-actuator being mounted in such position as toshare the impact of the hammer, and by its movement in response to suchimpact to actuate the driver through the pinion.

20. In an automatic hammer, the combination of a hammer-head, a hopper,a raceway leading therefrom to a driver, the driver, a driver-actuatormovably mounted and normally projecting from the hammer-face, the driverand its actuator being provided each with gear-teeth which mesh with anintervening pinion, and the pinion,whereby movement of the actuatortransmits to the driver a movement in direction reverse to that of theactuator.

21. In an automatic hammer, the combination with tack-feeding devices,of a hammerhead, two slideways therein, a driver slidingly mounted inone slideway, a driver-actuator slidingly mounted in the other, theactuator normally extended to such position as to share the impact ofthe hammer, the driver and actuator provided with gear-teeth which meshwith an intervening pinion, and the pinion, whereby movement of theactuator in response to impact transmits driving movement to the driver.

22. In an automatic hammer the combination of a hopper, anacevvayleading from the hopper to a delivery-channel in a hammerhead, the hammer-head, two slid eways therein, one coincident with thedelivery-channel, a driver sliding in said-slidewaflthe other slidewaybearing a movabl'e driver-actuator which is normally extended beyond theface 1 inion and the inion whereb movement of the hammer-head, thedriver and actn'ator provided with gear-teeth whichv mesh with a of theactuator in response to impact of the hammer aotuates the driver toforce 'a tack out of the delivery-channel.

23. Inan automatic hammer, the combination of a. hopper, a racewayleading therefrom,tacl;-driving mechanismconsisting of a driver anddriver -actuator, each provided with a rack, a pinion meshing with thesaid racks, the driver-actnator beingmonnted in I snchposition as toshare the impact of the hammer, and by its movementjin response to suchimpact to actuate the driver through the. pinion, and tackdeliverymechanism consisting of a tack-escapement and connections therewith tothe tack-driving mechanism, wherebytack feeding and tack-drivingoperations are alternated. 3 l 24. In an auto'matichammer, thecombination ofahopper a racewayleadingtherefrom, a hammer-head, adriver, a'driver-actnator, geared together by a pinion the pinion, atack-escapement in the raceway, connections between the "escapem'ent andthe pinion, whereby tack-feeding movement of the escapement alternateswith movement of the tack-driver and actuator. f a

25, In an autom'atichamm'er, thecombination with tack-feeding'devices,of a hammerhead, a mofvahly mount-ed tack -driver, a driver-actuatormovably mounted in snch'position astoshare the'impact of the hammer,andconnections between the driver and the actuator wherebymovement'ofthe actuator in response to impact actnates the driver and acatch under the control of 'th'eoperator,

be restrained from movement.

tionwith tack-feeding devices, of a hammerhead, a movably-mountedtack-driver a driver-actuator movably mounted in such po- ;sition as toshare the impaotof the hammer, and connections between the driver 'andthe actuator whereby movement of the, actuator in response to impactsactnates the driver and. a' spring-actuated catch, (under I the controlof the operatoiyand normally urged to- Ward a position of engagementwith the dr iveractuator, whereby the actuator may 27. In anautomatichammer, tion-with tackfeeding devices, of a hammer, tack-drivingmechanism consisting of a driver and a driver-actuator,each'providedwith a rackwhioh meshes with a pinion, thepinion, thedriver-actuator being mounted in such position as to share the impact ofthe hammer, and by its movement inresponse to such impact to actuate thedriver through the pinion,'and a catch under the control of the operator whereby the tackedriving mechanism may he restrained frommovement.

28,111 an automatic hammer tliecomhination with'taok feeding devices,of. acha'mmerhead, two slideways therein,a" driver"slidin'gly'mounted inone'slideway, a spring-controlled driver-actuator slidin'ggly mounted intheother, the actuator normallylextended by the force of its spring tosuch position as to share the impact of the hammeigand connec' tionshetween'the actuator and th'edriver whereby movement of theformer inresponse to impact transmits driving movement to the latter. w I a I Vj,

29. In an automatic hammer, the combination of jpincers, a hammer headsecured thereto, tack-drivingdevices in the hammerhead, a tack reservoirand raceway leading therefrom to ,the tack-driving devices, the pincermembers provided with a slot forlthe admission offthe tackraceWayJf rSigned by me, at Manchester; New Hampshire,"this 26th daytrtmmt, 1901. qANDREW STROMDAHL, V Witnesses: f i N V.

EDWINF. J ONES,

A; 3. LAN

the combina

